Improvement in machines for cutting ovals



H. McADAMS.

MACHINES FOR CUTTING OVALS.

No.179.039. Patented. June 20,187-6.

n E (I.

Wl'rnzsszs IuvnvroR NQFETERS. PHOTO-LITHOGRAPNER, WASHINGTON. DV (7.

STATES QFFICE,

HUGH MGADAMS, OF TORONTO, CANADA.

IMPROVEMENT IN MACHINES FOR CUTTING OVALS.

Specification forming part of Letters Patent No. 179,039, dated June 20, 1876; application filed April 1-3, 1876.

To all whom it may concern: wise fastened to the bar F, and projecting I Be it known that I, HUGH MOADAMS, of the through the bottom side thereof, holding a city of Toronto, in the county of York and friction-roller, J, which fits and works within Province of Ontario, Dominion of Canada, the groove 0. K is acarriage-head, havinga manufacturenhave invented acertain new and dovetail groove cut in its face, as shown, useful Machinebywhich Oircles,Ovals, and Irthrough which passes the bar F, the bevel 7 regular Figures can be marked or cutout with edges of which correspond with the said doverapidity; andIdo hereby declare that the foltail groove. L is a set-screw for pinching lowing is a full, clear, and exact description of against the bar F, and thus tightening the the same. head K upon the said bar, upon which it will The object of my invention is to produce a otherwise slidelongitudinally. This carriage portable cheap machine by which circles, is provided with a roller, M. N is a swivel ovals, and irregular figures can be marked or knife-head, pivoted to the carriage-head K, cut out with rapidity and accuracy; and conand provided with a roller, 0, and set-screw sists in a bar of steel or other suitable mate- P. Q is a knife or pencil passing through a rial, having at one end a handle, and at the slotted k'nifew'ay in the head N. This knife other a longitudinal slot, through which a Q passes between jaws provided at one end pin passes, which secures the said bar to a of the carriage K, which jaws prevent the metallic plate, having cut in its surface a head N from swiveling morethan is required. groove, oval, or such other shape as may he Having now described the general construcdesired to mark or cut out, within which tion of my machine,'very few words willsuffice groove fits a steel pin secured to the bar reto explain its operation. Having placed the /Terred to, which is also provided with an adplate A upon the material I wish to mark or jnstable swivel-head containing a pencil on cut up, and pressed-the bits B into the said kknife, as hereafter more particularly dematerial, to prevent the plate A from revolvscribed. ing thereon, I seize the handle D in one hand, Figure I is a sectional elevation through as and with the other take hold of the handle H, y of Fig. II. Fig." II is a plan. Fig. III is a by which Ipropel the bar F around the plate detail of adjustable head. FigelV is a detail A; and as the head N, holding the knife Q, is of a clip. properly set upon the bar F, which is con- A is a plate, having on its bottom face two nected to plate A, as before described,a figure or more bits, B, which are forced into the macorresponding to the groove 0 is made upon terial to be operated upon, in order to prevent the material. When it is desired to mark a the said plate A revolving thereon. G i a circle, the stud-piece I is removed, and the groove cut in th top fa of th lat A, clip 1%, which at other times acts merely as a which groove is either oval, as shown-in drawwasher, is turned so as to project over the end ing, or such other shape representing the 0f the bar F, as shown in Fig. IV. figure desired to be marked or out out of the W I Cl im as my invention is material to be operated, upon. D is a handle, 1- The sl tted bar F, pivoted to the plate A, having a shank, E, which is screwed or otherand provided with a stud-pin, I, and roller J, wise fastened into the center of the plate A. in GOInbiIIatiOH With the plate provided with F is a bar, having beveled edges and divisions groove 0, as and for the purpose specified. of inches marked upon its face, as shown. G 2. The carriage-head K, fitted to the bar F, is a slot out longitudinally in the bar F. H and provided with a roller, M, in combination is a handle attached to the end of the bar F with a pivoted head, N, provided Witha knife, opposite to that through which the slot G is Q, arranged as and for the purpose specified.

cut. Through this slot the shank E passes, Witnesses: HUGH MOADAMS. thereby connecting the bar F to the plate A, DONALD O- RIDOUT, as shown. I is a stud-pin, screwed or other- GEO. A. AIRD. 

